Answer:
At stage 3, it is most difficult to tell the embryo apart. This is because There are a lot of similarities at this stage and the distinguishing features have not developed yet.
Each embryo has some type of tail bone, whether it may or may not be used when actually born.
This can be used to support evoultion because the similarities clearly and visibily show a common ancestor between embryos. Because of their obvious similar traits, embryos must share ancestral DNA that they evolved from.
Explanation:
